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Welcome to the public review site of papers appearing in MobiSys 2012. Here you can find the public review written by a PC member for each paper and the authors' rebuttal to it. You can comment on any of them or add your own opinion. Finally you can vote to "like" or "dislike" a paper by clicking the up or down arrows next to its title.

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[–]nitya 1 point2 points ago

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Thought the concept was an interesting one and am curious to learn more about variance in performance across a diversity of devices and under different ambient conditions. I found a version of the paper online (on the author's site at http://www.cse.msu.edu/~glxing/docs/COBRA-sub.pdf) in case useful to others for pre-reading. Definitely a talk I want to attend.

[–]ConferenceQA 1 point2 points ago* 

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Asker Affiliation: KAIST

Question: In your design you used the RGB color space, the competitor is the CMYK colorspace. Is there any advantage to using RGB?

Answer: The difference is not in the colorspace we used; it is mainly in the design of the barcode. The HCCB does not have distortion, streaming, or decoding optimizations, which make it much less efficient.


Question 2: What are the processing overhead?

Answer: There is a paper talking about the overhead of the scanning techniques. The HCCB has to scan left to right then do a transform, which is much less efficient than our approach. In our design we have reference blocks which allow us to avoid the overhead of the transformation.

[–]ConferenceQA 1 point2 points ago* 

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Question: There is no feedback to indicate errors, how do you perform error correction?

Answer: Unfortunately when using the one-way communication scheme with the back-facing camera error correction isn't possible. In future work we hope to use front-facing cameras to enable duplex communication, in which case we can use feedback to help correct errors.